Why They're CoolThis is polymer haiku, spoken in slender curves, that works like an optical Clydesdale. » Featherweight, borderless poly lenses beat back light with double-gradient mirroring; polarizing cuts glare and bronze tint pumps up contrast. There's rubber at the nose and ears for gonzo security. » They ain't art; they're sports glasses, and good ones, with a special aptitude for ocean activity.Hmmm . . .Given their spare look, you may hesitate to take the Kanahas to the limit.RX-ABLE?Nope.